You don't. Red and blue are considered primary colour - colours you can not mix to achieve.
method to make purple paint 1. Mix red color with blue color
White light is a combination of all colors of light. To obtain white light, blue light can be combined with red and green light in specific proportions. Red light and green light mixed with blue light create an additive color mixture that results in white light.
White light is a combination of all colors of light. To obtain white light when combining with green light, you'll need to combine red and blue light as well, as red, green, and blue are the primary colors of light.
Red and green light must be combined with blue light to obtain white light, using the additive color mixing process.
Red color in acidic solutions and blue color in basic solutions.
Blue Litmus Paper turns red when it is placed in an acid
Blue is a primary color, red and blue mixed make the secondary color purple.
The color between blue and red is purple. It is a secondary color formed by mixing blue and red together.
When you combine blue and red, you get the color purple.
The color red can be changed to violet by adding the color blue. Red and blue are both primary colors, a violet is a secondary color.
The 'pixels' on a TV screen are red, blue, and green.
To obtain orange, mix red and yellow. To obtain green, mix blue and yellow. To obtain violet, mix blue and red.